Drum for hoisting-machines



(No Model.)

MUBGATROYD. DRUM FOR. H-O ISTI NG MACHINES.

No. 253,881. Patented Feb. 21.1882. 7

- UNITED STATES,

FRANK MUneAraoYD,

PATENT ratson CLEVELAND, 01310.

DRUM YFOR HOlSfl'lNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 253,881, dated February 21, 1882.

I Application filed December 16, 1881. (No model.) 7

To all whom. tt may concern Be it known that I, FRANK MURGATROYD,

' of Cleveland, in the county of Guyahoga and State of Ohio,have invented a certain newand Improved Drum for Hoisting-Machines; and I do hereby declare that the following is a full, clear, and complete description thereof.

This invention relates to animprovementin rope or cable drums for hoisting-machines, the construction and operation of which improvement are substantially as follows. For illustration of the same reference will be had to the annexed drawings, making apart of this specification, in which-- Figure 1 represents a vertical longitudinal section of the drum; Fig. 2, anend view of the drum. The rest of the figures are detached sections, to which reference will be made.

Like letters of reference refer to like parts in the several views.

As shown in the drawings, A represents a shaft having its bearings in standards B and B, both of which, .however, may be of such modification as to best adapt them to theframework of the machine. 0 is a cog-wheel secured to the said shaft A. On the inner side of the wheel is an annular beveled shaped groove, D. V

Loosely fitted to the shaft area pair of heads or centers, E and F, to the peripheries of which are secured a series of wooden lags, G, which,

together with the two centers, constitute the drum. The two heads or centers of the drum aresecured to each other and to the lags by screw-rods a, as seen in Figs. 1 and 2. On the shaft is also loosely secured by a feather key, b, a disk, H, in the inner surface of which is an annular groove, 1, corresponding to the annular groove D in the cogwheel 0, above alluded to.

It will be observed in Fig. 1 that the ends of section are formed inclined planes Z), Figs. 6

and 7, the inclined planes of one section'be- 'ing arranged and adapted to fit into and en gage the inclined planes of the other, as seen in said Fig. 7.

Section K of the clutch is provided with guide-arms M and N, whereby it is secured in the standard B, one arm on each side of the journal-seat, as seen in Fig. 3, and by which the section is restrained from turning on the shaft.

Fig. 5 is a view of section K of the clutch detached from the standard, and Fig. ashows aside view of the standard, wherein a are the g holes in which to insert the arms of the clutch.

In order that the drum may be made to revolve with the cog-wheel (J, the disk H is forced in direction of the arrow by the action of the clutch, and by means of the handle 0 the inclined planes of the clutch are moved one upon the other, thereby forcing the two sections thereof more or less apart, as may be desired. Section L of the clutch not being able to move back from section K, in consequence of its abutting against the standard or journal seat of the shaft, forces section K against the disk H, thereby crowding the annular groove I of the disk upon the ends of the lags, and at the same time forcing the opposite end of the lags by the movement of the drum in that direction) into the annular groove of the cog-wheel. The frictional resistance caused by the contact of the beveled ends of the lags in the groove of the wheel and that of the disk carries the drum around with the said wheel for winding the rope or cable there on. The pressure exerted upon the disk by means of the inclined planes of the clutch on being relieved by a reverse movement of the lever or handle 0 loosens the hold of the grooves upon the ends of the lags, allowing the drum to remain stationary, or to revolve in an opposite direction on the shaft, while the cog-wheel and disk continue to rotate in their original direction. The peripheral surface of the drum being of wood affords a stronger hold for the cable or rope winding thereon, and is less severe in frictional wearing of the cable than if the surface were of metal.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In hoisting-machines, a drum consisting of the two heads or centers, fitting loosely on A a shaft, having secured between and through the heads longitudinally a series of wooden lags or battens to form the exterior of the drum, the ends of these lags or battensprojectingbeyond the outer faces of the heads, and being beveled to fit the grooves in thefrictionavheels, constructed substantially as and for the purpose described.

2. The combination of a hoisting-drum having wooden lags or battens with their ends projecting beyond the centers with the friction-wheel and disk, having beveled annular grooves to correspond with the ends of the lags or battens, substantially as and for the purpose described.

3. The combination of the spur-gear wheel having a beveled friction-groove, the drum constructed with wooden lags or battens projecting into the groove, the disk having a groove to correspond with the beveled ends of the wooden lags or battens, and the clutch, consisting of the two sections with beveled ratchots, substantially as and for the purpose described.

4. The clutch consisting of the two sections.

K and L, having corresponding beveled ratchets, and the wings to prevent the turning of the stationary section, substantially as and for the purpose described.

In testimony whereof I atfix my signature in presence of two witnesses.

FRANK MURG ATROYD. Witnesses:

J. H. BURRIDGE, F. X. BYERLEYZ' 

